Suzanne gave you many websites to check. Perhaps you are looking for answers
for your own understanding. There is a book called:
The Cartoon Guide to Statistics by Larry Gonick & Woollcott Smith.
It is published by Harper Perennial (1993)
ISBN 0-06-273102-5
I would look for it in a Barnes & Noble type bookstore.
I like this book because it uses methods such as cartoons and drawings to
illustrate many of the basic principles. If you are teaching middle/high
school students, they will like this method.
I have learned almost all the statistics I know on my own from reading books
and asking questions of friends in the field. This is one of my source
books.
-Marielouise, for the Teacher2Teacher service